MALICIOUS
204
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document that contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites. The 'SE_BROWSER_INSTALL_LURE' heuristic indicates the document's content likely prompts the user to install a browser extension or update. This, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the execution of malicious actions, such as downloading a second-stage payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.9924
Heuristics 8
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/urr14loglahpmrnjaea8ms34bv/vawifasufavaketerozaxed.pdf In PDF document text
- http://syuncyoku.jp/upload/file/juxura.pdfIn PDF document text
- https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/koeeabmc2tfkmmq8n0qpdq9kek/50549338871.pdfIn PDF document text
- http://agataklimowska.pl/userfiles/file/tolojonanunakuditonod.pdfIn PDF document text
- http://banghetretunhien.com/media/ftp/file/jizuxogiwaxutalozenexid.pdfIn PDF document text
- https://jdlpartnerss.com/userfiles/file/5674033266.pdfIn PDF document text
- http://voxel-avocats.fr/uploads/file/fejogo.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b17e85cbf7d---94984517744.pdfIn PDF document text
- http://eldmsh1.ru/js/ckfinder/userfiles/files/59058014313.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/529abd464100d03dcc691ecf8ec8ab05/rateletunafulegitef.pdfIn PDF document text
- https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a3353ad54---lugopelujur.pdfIn PDF document text
- http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/54139100458.pdfIn PDF document text
- http://bettaletroom.com/file_media/file_image/file/kexeguweresamaga.pdfIn PDF document text
- http://texmet.pl/userimages/file/padimime.pdfIn PDF document text
- https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba0c8dbfa1---lupiramoragefov.pdfIn PDF document text
- https://dienlanhbachkhoa.info/upload/files/woloner.pdfIn PDF document text
- http://ccforum.kr/uploads/file/1621804045.pdfIn PDF document text
- http://qtjdb.com/UploadFile/2021/06/05/file/20210605_142514_138.pdfIn PDF document text
- http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/98a7eae9625fa1e4bcb7afe0f45ebd15/93239028592.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090f28d3cd20---gawosapizumumuwoj.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/k9agpb7su223q60rgi0nfg95q1/16291478507.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b81f7e0384c---9806612649.pdfIn PDF document text
- https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094cce7b972a---zerofomosufonozapipedupoz.pdfIn PDF document text
- http://china-engine.net/ckfinder/userfiles/files/pezizusiwaridotifikol.pdfIn PDF document text
- https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/9752a2a3b0bd383fdc806a1d5aed198a/kiwakajesivodefomaviw.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=ad+free+browser+apkPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000edcf.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDCF | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off000105e6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105E6 | 10452 bytes |
SHA-256: 095a10c4c98e1f32ba5e1f257e30f9f5bf0f444b70489da022481616ed5aac57 |
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font_02_sfnt_off00011d99.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11D99 | 16204 bytes |
SHA-256: 8bcc070ff20c027f7494cea7f783612adf7e1b6d7f8765a9ac06f5986c6e82d0 |
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font_03_sfnt_off00013368.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13368 | 17064 bytes |
SHA-256: 3bee665f2dc68127b0163e81ec55b3b5877b7a58accea934c6b1839c9d523711 |
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